Hello,
we bought your WooCommerce Vendor and Customers Conversation PRO [WooConvo PRO] plugin and everything was working fine until now. We have upgraded the base version of the WooCommerce Vendor and Member Conversation [WooConvo] plugin to version 7.3
The messages we send to the customer via the completed order come without message content, when the WooCommerce Vendor and Member Conversation [WooConvo] plugin rollback to version 6.9 everything works correctly.
Can you verify what the error is?